Retouching-machine



(No Model.)

B. ALLEN.

, RETOUGHING MACHINE.

No. 270,923. Patented Jan.23, 1883.

' W] T NESSES [NI EN TOR 3W 0W @WLQZZW ATTORNEY UNITED STATES EMMA ALLEN, OF FREEPORT, ILLINOIS.

RETOUCHlNG-MACHlNE.

SPECIFICATION forming part of Letters Patent No. 270,923, dated January 23, 1883.

Application filed ScptemberQB. 1882. (No model.)

T 0 all whom it may concern:

Be it known that I, EMMA ALLEN, a resident of Freeport, in the county of Stephenson and State of Illinois, have invented certain new and useful Improvements in Retouching- Machines; and I do hereby declare the following to be a full, clear,and exact description of the invention, such as will enableothers skilled in the art to which it pertains to make and use the same. v

My invention relates to improvements in retouching-machines of the class in which the surface of the negative is stippled by a reciprocating pencil point driven by a rotating shalt. The improvements which Ihavemadeareboth in the regulation of the driving-power and the construction and operation of thepencilholder. They are fully shown in the following drawings, in which Figure 1 is a perspective view of the driving mechanism, the pencil-holder, and a negativet'rame in working position; Fig. 2, an elevation of the pencil-holder, showing face of windwheel; Fig. 3, an elevation of holder from edge of wind-wheel, a portion of the shell of the holder being cut away to show internal construction and Figs. 4, 5, 6, and 7, views showing details of parts of the holder, as hereinafter referred to and explained.

The driving-power of the machine is an airpump of ordinary construction, g, Fig. 1,

worked by a treadle, and communicating by a tube, a, with a reservoir, 0, for compressed air. This reservoir has an outlet-tube, T, which delivers the compressed air through a funnel, 8, against the fans of the wind-wheel B, Figs. 2 and 3. on the outside of the cylindrical holder A. The shaft 0 of the wind-wheel B is journaled in the walls of the holder A, and is provided with a lug, E, makingit eccentric. The holder A, at the point of insertion of the-shaft (J, is transversely slotted,(w, Fig. 4,) and alongitudinally-slotted sleeve, c, Figs. 4 and 5, slides freely on the tube. .By means of this device the wind-Wheel may be readily detached for the insertion of another having a shaft of difl'erent eccentricity. On the tube A, at its lower end, is fitted a second tube, N, which may be readily detached. The lower end of the tube N is conical in form and open at the vertex of the cone, and within the holder A N is a rod,

'such speed as may be desired.

L, to which is rigidly attached a short tube, Q, for the reception of a pencil-point, R. The tube Q. fits so as to work freely but smoothly in the opening in the end of tube N. Near its upper end the rod L is flattened, at K, Figs. 3 and 6, and on this flattened portion works freely a slide, I, provided with longitudinal flange I and transverse flange H. The upper end of the rod L terminates in a head, F, and between the head F and the flange H is coiled a spring, G, tending to push them apart. The tube A has a slot, M, extending from its lower end to a point just below the wind-wheel, and in this slot slides the slide I, the flange I lying outside the tube, Figs. 1, 2, and 7. The slide is so fitted in the slotas to be readily moved up and down when desired, but is sufficiently tight to form a practically stationary hearing at any point where it is placed. On thelower tube,- N, of the holder is placed a rubber guard, P, making it easier to hold, and preventing it from turning in the fingers as readily as if it were smooth metal.

The operation of the machine is as follows: The reservoir a being filled with compressed air by means of the pump g, a steady, uniform current otlair is projected against the sails of the wind-wheel B, which is thereby rotated at At each revolution of the wheel the lug E of its shaft forces downward the head F of the rod L, and with it the rod and the tube-Q and pencil-point It thereto attached, and at the end of each downward stroke the head is thrown up by the spring G. The length of the stroke of the rod may be either equal to the eccentricity 'of the shaft 0 or as much less as may be desired, for by setting the slide I up or down on the holder the rod is brought nearer to or farther from the line of the shal'tcenter, and it may be set so far down upon the tube that the shaft does not reach the head F at any point in its revolution. The operator is thus enabled to control the length of stroke, and the range of work which can be done with the machine is much greater than when the stippling-point is run by a crank-shaft, as is the case in other machines of this class.

At each end of the flattened part K of the rod L is a shoulder, at, which prevents the slide I from working too far up or down on the rod,

ICO

and guards against too great a compression of the spring G.

I am aware that a wind-wheel inside of the holder has already been patented, and I do not claim the use of'a wind-wheel generally. I consider it preferable to place it outside, as shown, as it greatly reduces the bulk of the holder, and makes it lighter and easier to handle.

I am also aware that an air-pnmp communieating directly with the wind-wheel is already in use but the intervention of a compressedair reservoir renders the current steady and uniform, and takes away the direct effect of each stroke of the pump upon the wheel.

As shown in Fig. 1, the weight of the airtube and pencil-holder is supported by a hook, 00, attached to the negative-frame. Evidently, however, the book may be attached to any stationary object or dispensed with altogether.

Having now described my invention,what I claim as new, and desire to secure by Letters Patent, is-

1. In a retouching-niachine, the combination of an air-pump of suitable form, a reservoir for compressed air, a wind-wheel journaled to a pencil-holder of suitable construction, and tubing connecting the air-pump and reservoir and the reservoir and wind-wheel, substantially as shown and described.

2. In a'retouching-machine, the combination of a wind-wheel wholly outside a pencil-holder of suitable form, but having its shattjournaled in the walls of the holder, and a tube whose extremity is outside the holder and adapted to project a current of air against the fans of the wind-wheel, substantially as shown and described.

3. In a retouching-machine, the combination of an eccentric-shaft, journaled in the walls of a holder of suitable form, a wind-wheel mounted rigidly on said shaft and adapted to rotate the same, a pencil-carrying rod adapted to receive a longitudinally-reciprocal motion from the rotation of said shaft, and suitable means, substantially as described, for regulating the length of stroke of said pencil-carrying rod.

4. In a retouching-machine, the combination of a pencil-holder, A, transversely slotted, and a lougitudinally-slotted sleeve, D, adapted to permit the ready removal or insertion of the shaft of the wind-wheel, substantially as shown and described.

5. The combination of the eccentric-shaft 0, head I rod L, slide I, and spring M, and holder A, substantially as shown, and t'orthe purpose described.

In testimony whereof I have signed this specification in the presence ot'two subscribing witnesses.

EMMA ALLEN.

Witnesses:

R. H. WILns, G. S. DEAN. 

